every second adjective 1adverb 1noun 1 adjective1 •Every other/two; each alternate.Take the medication every second day. adverb1 •(figurative) Very frequently; more frequently than is desired.Why do you keep bothering me every second? noun1 •The entirety of something of duration.The man hated every second of the ten years he served in prison for a crime he didn't commit.After enduring traumatic experiences, many people are likely to remember every second of them.